Paint spraying device



Nov. 15, 1949 R ,V 2,488,195

PAINT SPRAYING DEVICE Filed Oct. 25, 1946 J 5e 60 86 a 5a r IN V EN TOR. sco'r'r R. IVEY,

' BY flm Patented Nov. 15, 1949 a UNITED STATES PATENT ()FFICE PAINT SPRAYING DEVICE Scott R. Ivey, Covington, Ky.,.assignor of forty per cent to John Ettensohn, Jr.,Green Township, Ohio Application October 25, 1946, Serial No. 705,584 4 Claims. 1(01. 299-58) 1 This invention relates to devices for spraying paint and the like.

An object of the invention is to provide a de vice by means of which paint may be sprayed upon a surface rapidly, and which is adjustable inexpensive to manufacture, and which is effectivein operation.

Other objects and advantages of the invention will become apparent from the following description of a preferred embodiment thereof as illustrated in the accompanying drawing, and in which-- Figure 1 is a perspective view of my improved paint spraying device, a

Figure 2 is a transverse sectional elevation of the spraying head of the device shown in Figure 1, and

Figure 3 is a partly sectional; longitudinal elevation of the spraying head shown in Figure 2.

Reference is now had-to the drawing,. in which like reference characters denote similar parts throughout the several views. As shown, there is a paint sprayer head generally indicated at 2,

which has an outer casing 4 with arcuate walls between locations 6 and 8 as seen in the transverse sectional view, Figure 2. The walls of the outer casing are flared between locations 6 and v In along one side, and between locations 8 and I2 along the other side of the casing to thereby form a skirt which is thus open along the portion between locations i0 and I2, afiording access to the interior chamber or recess l3 within the outer casing.

Left and right end walls 14 and I5 are attached to the corresponding ends of the casing 4 in any suitable manner to form an air-tight joint along all points of contact with the casing. An opening I8 is formed in the upper arcuate wall surface of the outer casing 4, and the metal around the opening is upformed to form a nipple 20 having a passageway 22 formed therein. A suction hose or tube 24 is attachable at one end 26 over the suction nipple 20, and has its other end 28 connected to a suction orvacuum pump, not shown, for creating suction in the tube 24 in the direction of the arrows 30. A container 32 is interposed in the vacuum tube 24 and serves as a f paint trap to collect paint which is sucked into the tube 24.

An intermediate casing 34 is disposed-inside, the outer casing 4, with its walls spaced from the outer casing all around. The casing is cylindrical in contour between locations 36 and; 38 as best seen in Figure 2, with its lower portion cut away and the edges of the cut-away portion flattenedout to form flanges Hand 3-? between locations 35 and 44 along one edge, and between locations Hand 42 along the other edge. The

ends of the intermediate casing are closed by end 7 wall members 44 whichare also spaced from the end walls 14 and I6 of the outer casing.

It is thus apparentthat asuction passageway 46 is formed between the inner wall surfaces of the outer casing 4 and the outer wall surfaces of the intermediate casing 34, through which passageway suction is applied in thedirection of the arrows 48, so as to draw paint particles and drops into the suction passageway 46 and up into the suction tube 24. Y r

The intermediate casing 34 has-a downwardly .open recess formed therein with a downwardly open throat 56 formed between the flanges 35 and 31, and an inner casing '52 is supported within the said recess. The casing 52 is generally cylindrical in contour with a chamber 54 formed Y therein, and is flattened along the lower portion of its wall from locations 56 to 58 adjacent the throat of the intermediate casing recess and forms a fiat base. An elongated inverted U-shaped spout 66 is positioned within and ex- .tends longitudinally of the inner casing 52 and has its legs52 and 64 supported on the flat base,

the legs 52 and 64 of the spout 66 being spaced,

from each other to form a, passage way 53 therebetween, the passage way 68 having the open end extending through the flat base of the casing '52 and forming, a discharge outlet for the passage way 68.

A duct 70 has one end communicating with the inside of the passageway 68 and has its other end extending through the walls of the inner, outer and intermediate casings as best shown in Figure 2, and forming an air tight seal between the saidwalls and the duct.

supply hose 14 connected to its nipple 16. The other end 18 of the hose T4 is connected to a paint container'Bfl, containing paint 82, air pres- I sure being maintained inside the-container above the paint 82 by means of an air pressure 1 hose 84 connected at one end to the container 88 and at its other end, not shown, to an air compressor. In this manner paint is forced in the direction of the arrows 86 and into the paint passageway 68 to emerge therefrom through the discharge outlet 60.

The width of the paint spray is regulated by means of variation in the spacing between adjacent edges of two elongated valve members 88 and 90, the one designated 88 being stationary and secured in place by screws 92. The other plate 90 is also secured in place by screws 94 which extend through slotted or elongated screw apertures 96 so as to allow the space between the adjacent edges of the members 88 and 90 to be adjusted by loosening the screws 94 and moving the member 90 closer to or further away from member 88. This effectively regulates the width of the spray of paint, which emerges in the direction of arrows 98, along the entire length of the inner casing 52.

A suitable handle, not shown, may be attached to the spraying head 2 for convenience in use. In operation, the suction and air pressures described are both applied at the same time, the paint being forced through the adjustable slot or crack between the members 88 and 90. The high pressure causes the paint to impinge against the surface to be painted with force, and with a good degree of penetration. At the same time, the vacuum or suction all around the paint spray picks up the paint that flies when it hits the surface being painted, and it also picks up the moving air caused by the forced painting. The air vacuum may be adjusted by a suitable valve, not shown, to leave any desired thickness of paint. The machine can also be used as a duster before painting.

It may be made in dimensions corresponding to brush sizes, although a single size may be adjusted for spraying a thin line of paint or a wide line or band of paint as desired. The use of the device shown, increases the speed of painting by many times over.

Although I have described a preferred embodiment of my invention in specific terms, it is to be understood that various changes may be made in size, shape, materials and arrangement without departing from the spirit and scope of the invention.

I claim:

1. In a paint spraying device, a spraying head comprising a closed hollow casing having a flat base, an elongated inverted U-shaped spout positioned in and extending longitudinally of said casing and having its legs supported on said base, the legs of said spout being spaced from each other to form a passage-way therebetween with the passage-way having the open end extending through the fiat base and forming a discharge outlet for said passage-way, co-acting elements arranged exteriorly of said base on opposite sides of the discharge outlet and mounted on said base for movement relative to each other for varying the width of the discharge outlet, a throat surrounding said base and connected to said casing, a second casing enclosing said first named casing, said second named casing having a closed upper portion and having an open lower portion, the closed upper portion of said second named tion of said second named casing being provided with a skirt, the skirt being spaced from said throat and forming with the latter a third passage-way therebetween, the second and third passage ways being in communication with each other and forming a suction passage-way, a duct having one end communicating with said first named passage-Way above the discharge outlet of the latter, and a conduit having an end extending through the closed upper portion of said second named casing and connected to the other end of said duct for supplying paint under pressure to said first named passage-way.

2. In a paint spraying device, a spraying head comprising a closed hollow casing having a fiat base, an elongated inverted U-shaped spout positioned within and extending longitudinally of said casing and having its legs supported on said base, the legs of said spout being spaced from casing embracing the first named casing and spaced from the latter to form asecond passageway therebetween, a hollow nipple 0n the top of the upper portion of said second named casing 'for connection to a suction source, the lower poreach other to form a passage-way therebetween with the passage-way having the open end extending through the fiat base and'forming a discharge outlet for said passage-way, a pair of plates arranged exteriorly of said base on opposite sides of the discharge outlet, one of said plates being fixedly mounted on said base and the other of said plates being mounted on said base for movement toward and away from the fixed plate for varying the width of the discharge outlet, a throat surrounding said base and connected to said casing, a second casing enclosing said first named casing, said second named casing having a closed upper portion and having an open lower portion, the closed upper portion of said second named casing embracing the first named casing and spaced from the latter to form a second passage-way therebetween, a hollow nipple on the top of the upper portion of said second named casing for connection to a suction source, the

lower portion of said second named casing being provided with a skirt, the skirt being spaced from said throat and forming with the latter a third passage-way therebetween, the second and third passage-ways being in communication with each and forming a suction passage-way, a duct having one end communicating with said first named passage-way above the discharge outlet of the latter, and a conduit having an end extending through the closed upper portion of said second named casing and connected to the other end of said duct for supplying paint under pressure to said first named passage-way.

3. In a paint spraying device, a spraying head comprising a closed hollow casing having a fiat base, an elongated inverted U-shaped spout positioned within and extending longitudinally of said casing and having its legs supported on said base, the legs of said spout being spaced from each other to form a passage-way therebetween with a passage-way having the open end extending through the flat base and forming a discharge outlet for said passage-way, co-acting elements arranged exteriorly of said base on opposite sides of the discharge outlet and mounted on said base for movement relativeto each other for varying the width of the discharge outlet, a second casa third casing enclosing said second named casing, said third named casing having a closed upper portion and having an open lower portion, the closed upper portion of said third named casing embracing the upper portion of said second named casing and spaced from the latter to form a second passage-way therebetween, a hollow nipple on the top of the upper portion of the said third named casing for connection to a suction source, the lower portion of said third named casing being provided with a skirt, the skirt being spaced from said throat and forming with the latter a third passage way therebetween, the second and third passage-Ways being in communication with each other and forming a suction passage-way, a duct having one end communicating with said first named passage-way above the discharge outlet of the latter, and a conduit having an end extending through the closed upper portion of said third and second named casings and connected to the other end of the duct for supplying paint under pressure to said first named passage-way.

4. In a paint spraying device, a spraying head comprising a closed hollow casing having a flat base, an elongated inverted U-shaped spout positioned within and extending longitudinally of said casing and having its legs supported on said base, the legs of said spout being spaced from each other to form a passage-way therebetween with the passage-way having the open end extending through the fiat base and forming a discharge outlet for said passage-way, a pair of plates arranged exteriorly of said base on opposite sides of the discharge outlet, one of said plates being fixedly mounted on said base and the other of said plates being mounted on said base for movement toward and away from the fixed plate for varying the width of the discharge outlet, a second casing surrounding said first named casing, said second named casing having a closed upper portion in contacting embracing engagement with the first named casing and having an open lower portion, the lower portion of said second named casing being provided with a throat, the throat surrounding the base of said first named casing, a third casing enclosing said second named casing, said third named casing having the closed upper portion and having an open lower portion, the closed upper portion of said third named casing embracing the upper portion of said second named casing and spaced from the latter to form a second passage-way therebetween, a hollow nipple on the top of the upper portion of said third named casing for connection to a suction source, the lower portion of said second named casing being provided with a skirt, said skirt being spaced from said throat and forming with the latter a third passage-way therebetween, the second and third passage-ways being in communication with each other and forming a suction passage-way, a duct having one end communicating with said first named passage-way above the discharge outlet of the latter, a conduit having an end extending through the closed upper portion of said second and third named casings and connected to the other end of said duct for supplying paint under pressure to said first named passageway, and valve means in said conduit exteriorly of said third named casing for controlling the admission of the paint to said first named passage-way.

SJCO'I'I' R. IVEEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

